mjrippe

ADC A5509 Output Transformer
« on: June 13, 2020, 02:27:40 PM »
Part #? of a continuing series of random transformer measurements...Upload folder is full, so this is on Dropbox: https://www.dropbox.com/s/5jl8bvyz2ua2s10/ADC%20A5509.jpg?dl=0


rackmonkey

Re: ADC A5509 Output Transformer
« Reply #1 on: June 15, 2020, 03:32:13 PM »
With those inductance values, it looks like it's probably a communications/speech transformer. Maybe for HAM radio or intercom applications. Have you swept it?
Whether you think you can or you think you can't, you're probably right.

mjrippe

Re: ADC A5509 Output Transformer
« Reply #2 on: June 15, 2020, 04:36:12 PM »
With those inductance values, it looks like it's probably a communications/speech transformer. Maybe for HAM radio or intercom applications. Have you swept it?

Nah, it's just OAD (Old As Dirt).  It's the mate to the A5508 being discussed here so I'm betting on similar freq response ie: Flat +/-2dB from 20Hz to 10kHz, then drop it like it's hot.  Will get to testing after I install new locks at the studio, pay my bills late, and ward off some grumpy clients  ;)

BluegrassDan

Re: ADC A5509 Output Transformer
« Reply #3 on: June 15, 2020, 08:22:56 PM »
I'm all in!

BluegrassDan

Re: ADC A5509 Output Transformer
« Reply #4 on: June 15, 2020, 09:02:28 PM »
By the way. I have a few other ADCs here at my desk right now.

A5509A
A5430
D6403 (also says LE1-M4391)

mjrippe

Re: ADC A5509 Output Transformer
« Reply #5 on: June 16, 2020, 12:25:06 PM »
By the way. I have a few other ADCs here at my desk right now.

A5509A
A5430
D6403 (also says LE1-M4391)

Awesome, will be interested to see the A5509A.  By the way, if you want my 5508/5509 set just PM me an offer of cash or trade.  I don't think I am going to have time to build a preamp with them anytime soon!

BluegrassDan

Re: ADC A5509 Output Transformer
« Reply #6 on: June 16, 2020, 12:57:03 PM »
Awesome, will be interested to see the A5509A.  By the way, if you want my 5508/5509 set just PM me an offer of cash or trade.  I don't think I am going to have time to build a preamp with them anytime soon!

These belong to a friend/client who wanted me to test them out. He has more salvaged parts from vintage consoles than anyone I know personally.

EmRR

Re: ADC A5509 Output Transformer
« Reply #7 on: June 16, 2020, 01:19:52 PM »
These belong to a friend/client who wanted me to test them out. He has more salvaged parts from vintage consoles than anyone I know personally.

Yeah he’s as OCD about it as I was years ago. 
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde

BluegrassDan

Re: ADC A5509 Output Transformer
« Reply #8 on: June 16, 2020, 03:26:58 PM »
Yeah he’s as OCD about it as I was years ago.

Haha! You know him.

Of course, no one on GroupDIY is has OCD, right?

EmRR

Re: ADC A5509 Output Transformer
« Reply #9 on: June 16, 2020, 03:51:11 PM »

Of course, no one on GroupDIY has OCD, right?

NO!.......of course not......
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde


mjrippe

Re: ADC A5509 Output Transformer
« Reply #10 on: June 16, 2020, 06:45:55 PM »
Haha! You know him.

Of course, no one on GroupDIY is has OCD, right?

And I'm not hoarding, either.  ;)


 

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